DSPIC33CK128MC502-I/2N - 100MHz DSC 128KB Flash UQFN-28 | Microchip
MPN: DSPIC33CK128MC502-I/2N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.42 | $342.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.86 | $2,860.00 |
DSPIC33CK128MC502-I/2N Overview
A Digital Signal Controller combines the computational throughput of a digital signal processor (multiply-accumulate instructions, DSP engine, looping hardware) with the deterministic, interrupt-driven behavior of a microcontroller in a single chip. Within the power-management hierarchy of embedded systems, a DSC sits above general-purpose MCUs and below application processors, occupying the niche of real-time control: the dsPIC33 family is the direct descendant of the dsPIC30F/dsPIC33F lines and forms the core of Microchip's dsPIC33C generation, which adds functional-safety features (FuSa) for industrial and automotive-adjacent designs.
Key features include a 100 MHz maximum core frequency executing up to 100 MIPS, high-speed PWM peripherals with 250 ps resolution for digital power conversion, and CAN Flexible Data-Rate (CAN FD) connectivity for modern industrial and automotive networks. The 3.0 V to 3.6 V supply window, 16 KB of on-chip RAM, and the on-chip DSP engine (single-cycle MAC, DSP addressing modes) differentiate this part from classic 16-bit MCUs.
Architecturally, the dsPIC33CK core uses an optimized C compiler-friendly instruction set with hardware looping, bit-reversed addressing, and an integrated DSP multiply-accumulate unit. The device supports ICSP (In-Circuit Serial Programming) and debugging through PGECx/PGEDx pin pairs - any pair may be used, but each clock/data pair must be kept together. The Extended Temperature (-40C to +125C) 'I' grade option supports industrial environments.
Typical applications include brushless DC and PMSM motor control, digital power supplies and PFC stages (exploiting the high-resolution PWM), and CAN FD nodes in industrial automation where the 100 MHz core must execute control loops at switching frequencies of 100 kHz or more.
Design consideration: always decouple the internal core regulator (VCAP pin) and connect PGEC/PGED pairs correctly for programming; the UQFN package also requires attention to thermal pad soldering for reliable grounding.
This page synthesizes distributor availability, drop-in same-family alternatives, application guidance, and design notes not found in the 984-page manufacturer datasheet.
Drop-in alternatives for DSPIC33CK128MC502-I/2N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPIC33CK128MC502-I/2N (same form factor and footprint) — differing in Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MC502-E/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK256MC502-I/2N
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33CK64MC502-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MC504-I/2N
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MC502-I/2N Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC |
| Maximum Clock Frequency | 100 MHz |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| Data Memory (RAM) Size | 16 KB |
| Supply Voltage Range | 3 V to 3.6 V |
| Number of I/O | 21 |
| Package | 28-UQFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Connectivity | CAN FD, UART, SPI, I2C |
| Peripherals | High-Speed PWM, ADC, Comparators, OPAMP |
| Operating Temperature | -40C to +85C (I grade) |
| Functional Safety Support | Yes (FuSa) |
| Programming Interface | ICSP via PGECx/PGEDx pairs |
| Series | dsPIC33CK128MC50X |
| Data Bus Width | 16 bit |
| RoHS Status | Compliant |
DSPIC33CK128MC502-I/2N 28-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK128MC502-I/2N (28-uqfn (6x6 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33CK128MC502-I/2N.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MC502-I/2N is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies (PFC / LLC), CAN FD Industrial Network Nodes, Sensor Signal Processing and Data Acquisition, Automotive-Adjacent and Functional Safety Designs, General Embedded Control and Robotics.
BLDC / PMSM Motor Control
The DSPIC33CK128MC502-I/2N fits brushless DC and permanent-magnet synchronous motor control because its 100 MHz (100 MIPS) core computes field-oriented control current loops fast enough for PWM switching frequencies of 50-200 kHz, while the high-speed PWM peripheral provides the edge resolution needed for accurate duty-cycle regulation. In this application the DSC reads phase currents through its ADC synchronized to PWM center points, executes Clarke/Park transforms and PI loops using the single-cycle MAC DSP engine, and drives a three-phase inverter through the complementary PWM outputs with programmable dead time. The 128 KB FLASH holds the FOC algorithm, speed ramps, and communication firmware without external memory.
Recommended
Digital Power Supplies (PFC / LLC)
For digitally controlled switch-mode power supplies, the DSPIC33CK128MC502-I/2N offers deterministic loop execution at 100 MHz plus PWM peripherals designed for power conversion: high resolution, multiple phases, and cycle-accurate ADC triggering. A boost PFC stage runs its voltage loop at roughly 10 Hz and current loop at 10-50 kHz on this DSC, while LLC or buck stages benefit from PWM frequency and phase adjustment on the fly. The CAN FD interface enables digital telemetry of voltage, current, and temperature to a system host, which is increasingly required in server and telecom power shelves. The 3.3 V rail operation integrates cleanly with standard controller-side logic.
Recommended
CAN FD Industrial Network Nodes
The integrated CAN Flexible Data-Rate module makes this DSC a strong fit for industrial network nodes that must also perform local real-time control, such as servo drives, sensor hubs, and machine I/O blocks. CAN FD supports data-phase bit rates up to 8 Mbps and 64-byte payloads, letting the DSPIC33CK128MC502-I/2N ship fast control-loop telemetry while receiving commands with low latency. The 16 KB RAM buffers message queues and DMA transfers so the core stays focused on control math. For a transceiver, pair with a 3.3 V CAN FD transceiver on the CAN Tx/Rx pins; termination and common-mode choke placement follow standard ISO 11898 practices.
Recommended
Sensor Signal Processing and Data Acquisition
The DSP engine (single-cycle MAC, dual operand fetch, bit-reversed addressing) gives the DSPIC33CK128MC502-I/2N real digital signal processing capability at MCU cost, making it suitable for vibration monitoring, power metering, and sensor fusion front ends. FFT windows, FIR/IIR filters, and RMS calculations execute in hardware-accelerated cycles that a conventional 16-bit MCU performs several times slower. The on-chip ADC with PWM-synchronized sampling supports coherent sampling of AC signals for power-quality measurement, while the 128 KB FLASH stores calibration tables and DSP coefficient sets. UART/SPI links stream processed results to upstream systems without CPU-heavy bit-banging.
Recommended
Automotive-Adjacent and Functional Safety Designs
Microchip positions the dsPIC33CK family with functional-safety (FuSa) support documentation, enabling use in industrial safety and automotive-adjacent subsystems such as pump controllers, actuators, and auxiliary inverter boards. The DSPIC33CK128MC502-I/2N pairs its 100 MHz core with safety-relevant diagnostics - clock monitoring, watchdog, and CRC-capable FLASH - that support designs targeted at safety integrity levels when combined with the Microchip safety manual and external diagnostic strategies. CAN FD connectivity matches the networking trend in zonal electrical architectures. Note this standard-grade part is not itself AEC-Q100 qualified; use the extended-temperature E-grade variant in the same UQFN package for harsher environments.
Recommended
General Embedded Control and Robotics
Beyond power and motor applications, the DSPIC33CK128MC502-I/2N serves as a high-performance general embedded controller in robotics, laboratory instruments, and automation modules where its 100 MIPS throughput, 21 I/O pins, and standard connectivity (UART, SPI, I2C, CAN FD) cover most node-level requirements. The DSP engine accelerates encoder interpolation, PID servo loops, and sensor filtering, while 128 KB FLASH accommodates substantial protocol and application firmware. Development uses Microchip MPLAB X IDE, the XC16 compiler, and the Curiosity/debugger toolchain; ICSP programming uses any PGECx/PGEDx pin pair, provided the chosen pair is used consistently for clock and data.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MC502-I/2N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MC502-E/2N | DSPIC33CK256MC502-I/2N | DSPIC33CK64MC502-I/2N |
|---|---|---|---|---|
| Package | 28-UQFN (6x6 mm) | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same | 28-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Frequency | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| FLASH Memory | 128 KB | 128 KB | 256 KB | 64 KB |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| Number of I/O | 21 | 21 | 21 | 21 |
| CAN FD | Yes | Yes | Yes | Yes |
Key Differentiators
- Full 128 KB FLASH without PCB change (vs DSPIC33CK64MC502-I/2N)
- Extended-temperature option in same footprint (vs DSPIC33CK128MC502-E/2N)
- Memory headroom for growth (vs DSPIC33CK256MC502-I/2N)
Design Notes
For the 28-UQFN (6x6 mm) package, design the PCB land pattern exactly per the Microchip UQFN application note and solder the exposed thermal pad to a ground array of vias - the pad is the primary ground connection and its voiding is a leading cause of intermittent failures. Decouple each VDD pin with a 100 nF ceramic placed within 2 mm, plus a 4.7-10 uF bulk capacitor. Connect the VCAP pin capacitor per datasheet requirements; this stabilizes the internal core regulator and must never be omitted.
The dsPIC33CK128MC502 has multiple PGECx/PGEDx pin pairs for ICSP programming and debugging. As documented in the Microchip programming guide, you may use any pair, but clock and data must come from the SAME pair (e.g., PGEC2 with PGED2) - mixing pairs from different pairs blocks programming. Route your programming header to one complete pair, keep the traces short, and avoid loading those pins with strong pull-downs that interfere with ICSP entry via MCLR.
The device operates from a 3.0 V to 3.6 V supply. In 5 V systems, derive the 3.3 V rail with a low-noise LDO or small buck; ensure the rail is within spec before MCLR release to guarantee a clean reset. ADC accuracy benefits from a quiet, well-filtered VDD - consider an RC or ferrite filter on the analog supply path. Estimated: at 100 MHz with typical activity, DSC core current is on the order of tens of mA; verify against the datasheet current-consumption tables for your exact clock configuration when sizing the regulator.
When using high-speed PWM outputs to drive gate circuitry, keep the PWM traces short and away from analog sense lines feeding the ADC; the fast edges of the high-resolution PWM can couple into current-sense inputs and corrupt control-loop sampling. Use PWM-synchronized ADC triggering (sampling at PWM center or trough) to reject switching noise inherently, and ground analog references as a star from the exposed pad.
Compliance Information
RoHS compliant per verified distributor listings for this MPN. AEC-Q100 qualification not stated in provided data for this standard-grade part; consult Microchip for automotive-qualified options.
